baber/WOPTO huggingface dataset:
Patent GB-155232-A (GB)
Title: Improvements in change speed gears for motor vehicles
IPC: F16H3/04
Filed: 1920-09-07
Abstract: 155,232. Oesterreichische Waffenfabrik-Ges. Dec. 5, 1919, [Convention date]. Variable-speed a n d reversing gearing comprises stopped toothed gears a, b, c on a driving-shaft M adapted to be meshed alternatively by a driven internallytoothed gear d. The gear d is moved axially into the plane of a coacting gear, and then swung into mesh by a lever m sliding on a pivot shaft p. The top speed is a solid drive obtained by engaging the gear c with a central toothed clutch member e. A universal connection e<1> may connect the gear d to, say, the driving wheels of a motor-vehicle. Reversed driving is effected by an idler k, Figs. 8 and 9, on a swinging arm g. The arm g is supported on a rockable spindle F which carries also a cam x and fingers i, i<1>. To bring the reverse into operation, the lever m is brought to the position shown in Fig. 9 with an extension u upon it between the fingers i, i<1> On canting the lever m about its pivot p, the arm g is swung to the left of Fig. 8, a spring plunger y acting on the cam x to complete the engagement of the idler k with the gear c. The gear d is then slid into mesh with the idler, completing the train. The wheels are shrouded to effect correct tooth engagement.
Patent GB-748841-A (GB)
Title: Improvements in regulators for ward-leonard systems
Inventor: BOLTON DENIS
IPC: H02P7/34
Filed: 1953-09-22
Abstract: 748,841. Automatic speed control systems. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 22, 1954 [Sept. 22, 1953], No. 26121/53. Drawings to Specification. Class 38 (4). In a Ward-Leonard system having speed control in accordance with the difference between a reference voltage and the motor terminal voltage, the load-current-compensating signal (derived e.g. from the voltage drop across the compoles) is applied through a pair of magnetic amplifiers so that the compensating signal reverses in polarity when the " generator " changes from generating to motoring. Specification 738,662 is referred to.
Patent GB-1237835-A (GB)
Title: Improvements in or relating to apparatus for measuring the moisture content of loose material
IPC: G01N27/12
Filed: 1969-05-22
Abstract: 1,237,835. Measuring moisture content. SINA A. G. May 22, 1969 [May 24, 1968], No. 26245/69. Heading G1S. A container 1 which may be at least partially filled with loose material from a conveyor (not shown) contains an electrically operating test probe 10 which measures the moisture content of the material, and a compressed air nozzle 3 which is usedto empty or flush the container after measuring. The container bottom 2 may be pivoted open to assist flushing by turning a crank 7 and a shaft 8 operated by a piston rod 6 actuated by an air motor 5. In a modification the container may be open at the top and provided with a fixed base without a hatch and a number of probes may be provided at different locations. In this last modification the loose material may be blown out of the fixed base container by a further air pipe (not shown). A block diagram electric circuit Fig. 3 (not shown) provides means for amplifying the signal from the probe 10 and passing this from the amplifier (113) to a servo motor (114) driving a moisture indicating and recording unit (115). After this, an interval timer (117) and selector switch (111) allows a switch (110) connecting the probe 10 to the evaluation unit (III) to return to its normal position. Other relays and switches are then operated to air flush the container 1 and pivot the bottom 2, and filling of the container is commenced anew.
Patent GB-1015619-A (GB)
Title: Improvements in or relating to vinylaromatic polymer preparation
Inventor: GULPEN NICHOLAAS JOZEF HENRICU
IPC: C08F2/00
Filed: 1963-07-02
Abstract: Vinylaromatic monomers are polymerized using as initiator <FORM:1015619/C3/1> where R is a tertiary alkyl or aralkyl radical, and R1 and R2 are a C1- 2 alkyl radical. The monomer may be styrene. The initiator may be 2,2 - bis (4,4 - ditert. - butyl - peroxy - cyclohexyl)-propane, e.g. 0.05-1%.  The polymerization may be carried out at 70-200 DEG C. and may be in bulk or in aqueous emulsion including polyvinyl alcohol.ALSO:A peroxide of formula <FORM:1015619/C2/1> where R is a tert.-alkyl or aralkyl radical, and R1 and R2 are a C1- 2 alkyl radical, is obtained by reacting a compound of formula <FORM:1015619/C2/2> where R1 and R2 are as above, with a tert.-alkyl or aralkyl hydroperoxide, in the presence of an acid reacting catalyst and eliminating water from the reaction.  In an example a benzene solution of 2,2-bis-(4-keto-cyclohexyl)-propane tert.-butyl-hydroperoxide and 70% sulphuric acid was heated at 40 DEG C.; the water formed was removed by azeotropic distillation with benzene; the reaction mixture was then treated with e.g. sodium bicarbonate and evaporated in vacuo to produce 2,2-bis-(4,4-di-tert.-butyl-peroxy-cyclohexyl)-propane.
Patent GB-1342414-A (GB)
Title: Cloth feed controls for cloth laying machines
Inventor: BENSON ROBERT W
IPC: A41H43/00
Filed: 1971-04-19
Abstract: 1342414 Cloth spreading machines CUTTERS MACHINE CO INC 19 April 1971 [4 May 1970] 26254/71 Heading D1S [Also in Division G3] A cloth laying machine 10 includes a frame 11 movable over a laying surface 13, means 24 for laying cloth 17 on the surface 13 from a supply 16, and means 15 for feeding the cloth 17 from the supply 16 to the laying means 24, including an electric feed motor 45, an electric cloth feed control being provided, comprising means for sensing the speed of the cloth feed 17 relative to the frame speed and producing an electric signal proportional to this speed difference and a control circuit for operating the feed motor 45 at a speed corresponding to the frame speed, under the control of the signal from the sensing means. The frame 11 is reciprocated on wheels 12 by an electric motor (30), Fig. 2 (not shown) acting through a chain transmission 27, means including a plunger 161 actuating switches in the control circuit, Fig. 6 (not shown) to switch the motor (30) from high to low speed and effect reversal approaching and at the end of the frame traverse. A dancer roller 21 is supported between plates 54 journalled on a shaft 47 of a top feed roll 20, Fig. 4, the tension of the cloth tending to pivot the plates 54 against a spring 60. The roller 21 and roll 20 are driven at equal opposite speeds by the motor 45 via chains 44, 50, (57), Fig. 5 (not shown), feed rollers 33, 34 for supporting the cloth supply roll 16 being driven synchronously through chains 35, 36. A bracket 64 of one plate 54 bears sensing means 65 in the form of a potentiometer 65 cooperable with an adjustable wiper on a bracket 66, so that movement of the roller 21, owing to variation in the tension of the cloth being layed as the speed of the frame 11 varies, alters the potentiometer resistance. Variation of the potentiometer resistance acts through the control circuit to adjust the speed of the motor 45 in order to maintain a constant relationship between the speeds of the frame 11 and the feeding means 15, ensuring uniform laying. A manually actuable potentiometer (155) in the circuit allows adjustment of the relative motor speeds to adjust the cloth tension and an edge control device (40), Fig. 2 (not shown) governs adjustment of the feeding means 15 transversely of the feed direction.
Patent GB-318488-A (GB)
Title: Manufacture of optically active 1-phenyl-2-methyl-aralkylaminopropanols-1 and 1-phenyl-2-methylaminopropanol-1
Filed: 1929-08-29
Abstract: 318,488. I. G. Farbenindustrie Akt.- Ges. Sept. 3, 1928, [Convention date]. Amino-alcohols. - Racemic 1-phenyl-2-methylaralkylaminopropanols-1 are resolved into their optically-active components by means of tartaric acid. The products can be converted into the optically-active 1-phenyl-2-methylamino-propanols- 1 by hydrogenation, the aralkyl group being eliminated. When for instance 1-phenyl-2- methyl-benzylamino propanol-1, which can be prepared by reducing methylbenzylaminopropiophenone or by interaction of phenylpropanolmethylamine with benzyl chloride, is treated with d-tartaric acid in aqueous solution, the d-tartrate of the d-base crystalizes out leaving the dtartrate of the l-base in solution, from which the l-base can be precipitated by addition of alkali. Catalytic hydrogenation of the l-base yields l-1- phenyl-2-methylaminopropanol-1, which is identical with natural ephedrine. The d-base, obtained from the aforementioned crystalline product by treatment with alkali, is converted by catalytic hydrogenation into d-1-phenyl-2-methylaminopropanol-1. The 1-phenyl-2-methylbenzylaminopropanol-1- may also be resolved by means of l-tartaric acid, in which case the l-tartrate of the l-base separates out first. The products are worked up as before. The starting materials may be prepared in a manner analogous' with those for the preparation of 1-phenyl-2-methyl-benzylamino-propanol-1 described above. The Specification as open to inspection under Sect. 91 (3) (a) also describes the use of methyl and ethyl alcohols as solvents in lieu of water; this subject-matter does not appear in the Specification as accepted. Amino - ketones. - Methylbenzylaminopropiophenone is otained by interaction of methylbenzylamine and bromopropiophenone. Other methylaralkylaminopropiophenones are prepared in an analogous manner.
Patent GB-863543-A (GB)
Title: An electrically controlled typewriting machine
IPC: B41J7/02
Filed: 1957-08-21
Abstract: 863,543. Typewriters. OLYMPIA WERKE A.G. Aug. 21, 1957 [Sept. 8, 1956], No. 26387/57. Class 100(4) In a keyboard actuated electric time-control device for typewriters and like machines where, upon the depression of a type key 1, a power roller 18 is switched on, and the automatic switching off is delayed each time a key is operated by means of a, Geneva wheel mechanism, a magnet 14 is provided so that a full action of the key to effect its function, is delayed until after the power roller is operating. Upon the depression of any key 1, its first stage of operation vertically depresses a locking bar 21, pivots a lever 3, and a latch 7 releases a slide 16, 16a. This slides to the left under the pull of a spring 19 and opens contacts 21 preventing operation of the magnet 14 At the same time an arm 16f of the slide 16 pivots a bell crank 23 which axially displaces a disc 25, and a pin 25a thereon is moved from.a recess in a Geneva wheel sector 32. A spring 34 pulls the sector against a stop 35, and contacts 37 are closed to switch on a motor driving the power roller 18. A cam 17 is now driven and shifts the slide 16 back to the right and contacts 21 close, magnet 14 operates, and by means of linkage 13, 12 the locking bar 21 pivots and finally releases the keyboard. The power roller is thus fully running before a type-action occurs. Each time the power roller rotates, a fourmember linkage 39-42 advances a ratchet wheel 28 which would, if no further key were depressed, pivot the sector 32 counter clockwise and eventually cause a resilient toggle to snap against a stop 36c and the motor contacts 37 to be opened. If however typing occurs a universal bail 24 and lever 30 are actuated to pivot the bell crank 23; this axially displaces the pin 25a so that the sector pivots clockwise and maintains the motor contacts 37 closed. A switching-off time control setting lever 47 adjusts the four-member linkage 39-42 and controls the amount of rotation of the ratchet wheel 28.
Patent GB-484203-A (GB)
Title: Improvements in advertising, indicating and displaying devices
IPC: G09F11/00
Filed: 1936-09-30
Abstract: 484,203. Displaying. SANDOR, N., and SANDOR, F. E. L. Sept. 30, 1936, Nos. 26563 /36 and 19381 /37. [Class 3 (i)] A plurality of independent display panels 2 are selectively raised into viewing position by fluid pressure controlled by manually operated keys 6 on a key-board 7. Each panel 2 is carried on top of a piston 4 working in a cylinder 5, the bottom of each cylinder being connected by a tube 21 to a valve in a block 8, Fig. 3. The valves each comprise a rubber washer 17 mounted on a stem 18 normally spring-pressed upward to close the washer against a seating 15, and shut off air supply from a common chamber 10 to the tube 21. The top of the stem 18 is covered by a rubber &c. sleeve 19 topped by a cap 20. On pressing down the cap 20 the passage from the chamber 10 to the tube 21 is opened, and on allowing the cap to rise said passage is closed and one beneath the sleeve 19 is opened, allowing air to escape from the cylinder to the atmosphere. The caps 20 are depressed by rods actuated by the keys 6. The reservoir 11 is fed from a compressor 12 driven by a motor 25. Each panel 2 may be provided with two display areas 3, the panel being raised in two steps to reveal each area in succession. Means for effecting this may comprise a projection on each piston 4 which abuts against a plate through perforations in which all the pistons pass. The plate retains the upper area 3 in view, and on laterally moving the plate by an electromagnet actuated by a key 6, the projection is released to let the panel rise to show its lower area 3. Alternatively a stop bar projecting from a pivoted lever may bear on the tops of the frame 8, a disc on the lever shaft being engaged by a pawl on a rod moved by blocks mounted on the key push rods. The pressure of air in the reservoir 11 may be maintained automatically, or the reservoir may be dispensed with and the motor 25 started at each depression of a key 6 to supply the air necessary for the cylinder 5 in use.
Patent GB-362502-A (GB)
Title: Improvements in or relating to transmission efficiency controlling arrangements for electrical wave transmission systems
IPC: H03G3/06
Filed: 1930-09-05
Abstract: 362,502. Valve amplifying circuits. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.- (Assignees of Miller, R. A. ; 628, Stelle Avenue, Plainfield, New Jersey, U.S.A.) Sept. 5, 1930, No. 26593. Convention date, Sept. 12, 1929. [Class 40 (v).] In a multistage low-frequency amplifier, an input volume-control potentiometer is associated with an inter-valve volumecontrol potentiometer in such a manner that a substantial decrease in signal strength is effected in the last stage of the amplifier before the volume control is applied to the preceding stages. This ensures a constant ratio of signal strength to " noise without overloading the amplifiers. As shown the potentiometer 20 controls the input to the amplifier A1. A second potentiometer 22 is shunted across the coupling- transformer 21 between the first and second amplifiers Al, A2. The tapping point to the two grids is carried on a common member 83, and the attenuation resistances 91, 93 in both potentiometers are so arranged that as the control member 83 moves downwards, to decrease the volume-response, the loss introduced by the potentiometer 22 steadily increases (through resistances 93) whilst no loss occurs in the potentiometer 20. When a point is reached corresponding to that shown in the Figure, the contact 80 starts to decrease the gain in the first amplifier A1 (by bringing into circuit the resistances 91) whilst the loss in the control potentiometer 22 remains at a maximum. When the control member 83 is moved in the reverse direction, to increase the amplifier gain, attentuation losses in the potentiometer 20 are reduced to a minimum before any loss occurs in the interstage potentiometer 22. The two amplifiers Al, A2 may be arranged in push-pull, as well as the output stage A3, A4. High-tension current from the rectifiers R5, R6 is filtered first by series inductance 36 and shunt condensers 37, 38, then by choke 45, resistances 43, 44 and shunt condenser 46, and finally by resistances 47, 48 and 53, 54 with shunt capacities to earth at 74, 73 and 75, 73 respectively. Grid-bias for the valve A1 is derived from a resistance 51 through filter resistances 61, 62 and shunt condensers 63, 64, and for the valve A2 through resistance 51 and filter 65, 66. Bias for the output amplifiers A3, A4 is supplied by the drop across resistances 51, 52, through a filter resistance 68 and shunt condenser 69.
Patent GB-701266-A (GB)
Title: Improvements in or relating to luminescent materials
IPC: C09K11/71
Filed: 1950-11-01
Abstract: 701,266. Luminescent materials. GENERAL ELECTRIC CO., Ltd., and McKEAG, A. H. Jan. 31, 1952 [Nov. 1, 1950], No. 26696/50. Class 39(1) A luminescent material capable of excitation by ultra-violet radiation of 2537 A wavelength, by X-rays, or by cathode rays, and having a very short afterglow, consists of or contains barium phosphate activated by tin, the composition of the barium phosphate lying within the range having from 2 per cent by weight of barium oxide in excess of that in the pyrophosphate to 45 per cent by weight of phosphous pentoxide in, excess of that in the pyrophosphate. The proportion of tin is preferably not greater than 10 per cent by weight of the barium phosphate material, the best results being obtained when the proportion is from 1 to 2 per cent. The tin should preferably be present in the divalent state and may be introduced in the form of stannous chloride. The material can exist in four different phases which show respectively red, green, cream and blue luminescence, although a considerable amount of overlapping of the phases occurs. A table is given showing the interplanar spacings and reflections obtained by an X-ray analysis of the phases. A process for manufacturing the material includes the step of heating at an elevated temperature, for example between 600‹C and 1100‹C, and in a reducing atmosphere, preferably hydrogen, a barium phosphate of the above specified composition, or a substance or substances adapted to produce such a barium phosphate during the heating, together with tin or a compound thereof. The substance heated may be a precipitated barium phosphate, which, if a material having the pyrophosphate composition is required, may be mainly barium hydrogen phosphate obtained by precipitation. from a solution of barium chloride and diammonium hydrogen phosphate. To obtain a material of composition other than the pyrophosphate, the content of barium oxide or of phosphorous pentoxide may be increased by adding to the precipitate before heating preferably not more than 2 per cent of barium carbonate or not more than 25 per cent of diammonium hydrogen phosphate by weight (estimated) of the precipitate after heating. The precipitate, after washing and drying, may be mixed with tin or a tin compound and the mixture heated, or a soluble tin compound may be added to the barium compound solution and coprecipitated with the barium phosphate. An alternative method of producing a material of a more acid composition than the pyrophosphate comprises mixing and heating barium pyrophosphate and barium metaphosphate together with tin or a tin compound. In another alternative method, a powdered mixture of barium carbonate and diammonium hydrogen phosphate is heated with the tin or tin compound. It is usually desirable to carry out the heating in three stages. Firstly in air, secondly in hydrogen and thirdly again in air. The effects of varying the composition of the material and the temperature of firing in hydrogen on the colour emitted are tabulated.
Patent GB-821146-A (GB)
Title: Apparatus for the continuous electrical heat-treatment of textile yarns
IPC: D01D10/04
Filed: 1956-08-31
Abstract: 821,146. Electrically heated tubes for treating textile yarns. HEBERLEIN & CO. A. G. Aug. 31, 1956 [Sept. 1, 1955], No. 26728/56. Class 39(3) Natural or synthetic textile yarns are subjected to heat treatment especially heat fixing by passage through a metal tube 1 having a spiral groove 2 along substantially its whole length within which is laid an insulated heating wire resistor 3; and the tube 1 has at both ends coaxial tubular extensions 4 of bad heat conductivity, the tube 1 and extensions 4 being surrounded by an insulating layer 7 e.g. of compressed slag wool held in place by a sheet metal casing 8. The tube 1 may be of steel and is disposed in a coaxial tube 10 which may be of copper and may fit snugly thereon. The tubular extensions 4 may be nickel chrome steel or ceramic and are equal in length to the thickness of the insulating layer 7. The heating wire is of nickel chrome steel covered by asbestos. Each tube 4 carries a metal rod 5 carrying an insulated duct 6 for the heating wire 3. The tube may be used in the heat fixing of mechanical deformations of a synthetic yarn, e.g. based on a polyamide fibre which has been given a very high twist which is removed after heat fixing.
Patent GB-519046-A (GB)
Title: Improvements in or relating to machines for the treatment of the ground, such as agricultural implements, for instance ploughs, harrows and the like
IPC: A01B3/00
Filed: 1938-09-13
Abstract: 519,046. Implements for working land. PATENTVERWERTUNGS-GES, HERMES. Sept. 13, 1938, No. 26739. Convention date, Sept. 13, 1937. [Class 6 (i)] A plough, harrow or other implement for working land is provided with a share or other tool which is resiliently suspended and is given a vibratory motion by a positive driving mechanism. Fig. 1 shows a share 2 resiliently suspended from a plough frame 1 by a member 3 which is vibrated at a high frequency by an eccentric member 8 mounted on a shaft 4. The shaft 4 is rotated by a belt 5 from a wheel of the plough. Fig. 2 shows a modification in which the share 2 is carried by a leaf spring 6 which supports an eccentric device 4 which may be driven from the wheel or from a tractor or by means of an electric motor. Oscillations may also be induced in the share by electromagnets excited by alternating or pulsating currents.
Patent GB-474179-A (GB)
Title: Indirectly heated high-voltage cathodes for electric discharge devices
IPC: H01J1/20
Filed: 1936-10-02
Abstract: 474,179. Electric heating resistances for electric discharge devices. RADIOAKT.-GES. D. S. LOEWE. Oct. 2, 1936, No. 26774. Convention date, Oct. 2, 1935. [Class 39 (iii)] The cathode 4 is heated by current passed through a layer of hard carbon 7 deposited on the inside of the tube, Fig. 3, or deposited on a thin ceramic rod 1 arranged in the tube, Fig. 1. Terminal caps 3 are arranged over graphite or metal coatings 2 provided over the ends of the layer. The carbon deposit is obtained by the decomposition of benzole vapour in a furnace in which are arranged the tubes or rods to be coated. Heating of the layer is effected at 1000 C. for a certain period of time after deposition.